<template>
    <div class="list" ref="wrapper">
      <div>
        <div class="area">
          <div class="title border-topbottom">当前城市</div>
          <div class="button-list">
            <div class="button-wapper">
              <div class="button">{{this.currentCity}}</div>
            </div>
          </div>
        </div>
        <div class="area">
          <div class="title border-topbottom">热门城市</div>
          <div class="button-list">
            <div class="button-wapper"
                 v-for="item of hot"
                 :key="item.id"
                 @click="handleCityClick(item.name)"
            >
              <div class="button">{{item.name}}</div>
            </div>
          </div>
        </div>
        <div class="area" v-for="(item,key) of cities" :key="key" :ref="key">
          <div class="title border-topbottom">{{key}}</div>
          <div class="item-list">
            <div class="item border-bottom"
                 v-for="innerItem of item"
                 :key="innerItem.id"
                 @click="handleCityClick(innerItem.name)"
            >
              {{innerItem.name}}
            </div>
          </div>
        </div>
      </div>
    </div>
</template>

<script>
import Bscroll from 'better-scroll'
import {mapState, mapMutations} from 'vuex'
export default {
  name: 'CityList',
  props: {
    hot: Array,
    cities: Object,
    letter: String
  },
  computed: {
    ...mapState({
      currentCity: 'city'
    })
  },
  methods: {
    handleCityClick (city) {
      this.changeCity(city)
      this.$router.push('/')
    },
    ...mapMutations(['changeCity'])
  },
  mounted () {
    this.scroll = new Bscroll(this.$refs.wrapper)
  },
  watch: {
    letter () {
      if (this.letter) {
        const elem = this.$refs[this.letter][0]
        this.scroll.scrollToElement(elem)
      }
    }
  }
}
</script>

<style scoped lang="stylus">
@import "~styles/varibles.styl"
.border-topbottom
  &:before
    border-color #ccc
  &:after
    border-color #ccc
.border-bottom
&:before
  border-color #ccc
.list
  overflow hidden
  position absolute
  top 1.58rem
  left 0
  right 0
  bottom 0
  .title
    line-height .4rem
    background #eee
    padding-left .2rem
    color #666
  .button-list
    overflow hidden
    padding .1rem .6rem .1rem .1rem
    .button-wapper
      float left
      width 33.33%
      .button
        margin .1rem
        padding .1rem 0
        text-align center
        border .02rem solid #ccc
        border-radius .06rem
  .item-list
    .item
      line-height .54rem
      color #666
      padding-left .2rem

</style>
